”Intel says that an analysis of defective processors "confirms that the elevated operating voltage is stemming from a microcode algorithm resulting in incorrect voltage requests to the processor." In other words, the CPU is receiving too much power, which is degrading stability over time.

If you're using a 13th- or 14th-generation CPU and you're not noticing any problems, the microcode update should prevent your processor from degrading. But if you're already noticing stability problems, Tom's Hardware reports that "the bug causes irreversible degradation of the impacted processors" and that the fix will not be able to reverse the damage that has already happened.”